<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width,user-scalable=no,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0">
    <title>Title</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body{
            height: 2000px;
        }
        .sanPic{
            width: 300px;
            height: 300px;
            /*background-color: pink;*/
        }
        img{
            width: 50px;
            height: 50px;
        }
        .bgsize{
            width: 500px;
            height: 500px;
            background: url("背景图（大）.png") no-repeat;
            border: 1px solid #666;
            /*background-size: cover;*/
            /*background-size: contain;*/
            /*background-size: 200px;*/
            /*background-size: 200px 300px;*/
            /*background-size: 50%;*/
        }
        .bgSan{
            width: 50px;
            height: 50px;
            background: url("主页-01-150.png") no-repeat;
            background-size: 50px 50px;
        }
        .boxSizing{
            width: 200px;
            height: 200px;
            background-color: pink;
            padding: 10px;
            border: 10px solid red;
        }
        .boxSizing1{
            width: 200px;
            height: 200px;
            background-color: skyblue;
            border: 10px solid blue;
            padding: 10px;
            box-sizing: border-box;
        }
        a{
            -webkit-tap-highlight-color: transparent;
            -webkit-touch-callout: none;
        }
        input{
            -webkit-appearance: none;
        }
    </style>
</head>
<body>
<div class="sanPic">
    <img src="../移动端基础/img/主页-01.png" alt="">
    <img src="../移动端基础/img/主页-01-150.png" alt="">
</div>
<div class="bgsize"></div>
<div class="bgSan"></div>
<div class="boxSizing"></div>
<div class="boxSizing1"></div>
<a href="#">百度一下，我就知道</a>
<input type="button" value="提交">

</body>
</html>